indirect vs roundabout

indirect is not a noun while roundabout is a noun.

Word	Noun	Adjective	Verb	Adverb
indirect	No	Yes	No	No
roundabout	Yes	Yes	No	No

indirect (noun)	roundabout (noun)
	a road junction at which traffic streams circularly around a central island
	a large, rotating machine with seats for children to ride on for amusement

indirect (adjective)	roundabout (adjective)
not direct in spatial dimension; not leading by a straight line or course to a destination	deviating from a straight course
extended senses; not direct in manner or language or behavior or action	marked by obliqueness or indirection in speech or conduct
descended from a common ancestor but through different lines
having intervening factors or persons or influences
not as a direct effect or consequence